#include<iostream>
using namespace std;

int main()
{
	int val = 0;
	val = 9 / 2;
	//val = 2 ^ 1 ^ 2 ^ 3 ^ 4 ^ 1;
	//int val1 = val ^ 2;
	//int val2 = val1 ^ 1;
	//int val3 = val2 ^ 2;
	//int val4 = val3 ^ 3;
	//int val5 = val4 ^ 4;
	//int val6 = val5 ^ 1;

	cout << val << endl;
	//cout << val1 << endl;
	//cout << val2 << endl;
	//cout << val3 << endl;
	//cout << val4 << endl;
	//cout << val5 << endl;
	//cout << val6 << endl;
	return 0;
}